46
TWITE INSTRUMENTS
THERMOSTAT MODEL TD-196 OPERATING MANUAL
CALIBRATION AND DEFAULT VALUES CONT.
C
ALIBRATE
S
ENSORS
(9) “ENT” & “
s
” “
t
” KEYS
This determines the high and low calibration offset values to ensure accurate tem-
perature calibration.
The offsets are stored into non volatile RAM for use in software calibration during
the normal run mode of the unit.
NOTE :- DO THIS BEFORE DOING THIS FUNCTION.
THIS IS REQUIRED ONLY IF THE 8 CHANNEL OPTION IS PRESENT.
IF THE OPTION IS NOT PRESENT SKIP THE CHANNEL SELECTION
AND GO TO THE FOLLOWING PAGE.
PRESS “SET”
ENTER PASSWORD IF REQUIRED
s t
TO SELECT “
29
- CHANNELS CONNECTED”
PRESS “ENT”
SELECT OR DESELECT CHANNELS AS REQUIRED ENSURING ONLY
CHANNELS TO BE CALIBRATED REMAIN CONNECTED. BY PRESS
ING THE
s
KEY TO CYCLE THROUGH THE CHANNEL NUM-
BERS ON
THE RIGHT HAND LED INDICATOR, AND PRESS THE
t
KEY TO
SELECT OR DE SELECT EACH REQUIRED CHAN-
NEL. "YES" = THAT
CHANNEL IS SELECTED
(CON-
NECTED)
AND "no" = THAT CHANNEL
IS NOT SELECTED
(NOT CONNECTED).
PRESS “ENT” WHEN ALL CHANNELS TO BE CALIBRATED ARE
SELECTED.
NOTE :- ALL SENSORS THAT ARE SET TO CONNECTED
WILL HAVE THEIR VALUES CHANGED. THIS WILL CAUSE
THE WRONG OFFSET VALUES TO BE WRITTEN TO THE
MEMORY IF THE SENSORS THAT ARE SET TO CONNECTED
ARE NOT IN THE CALIBRATION PROCEDURE.
